What is hactagon?

Answer 1

Any word which ends in ~agon indicates a figure with several sides, usually more than four. There is no such word as a hactagon, but you might be thinking of any of the following * 5 sides - pentagon * 6 sides - hexagon * 7 sides - heptagon * 8 sides - octagon * 9 sides - nonagon * 10 sides - decagon